Good evening people of passionford.

i have a mk4 Escort combi van that im currently building. Im at the stage now of choosing a head for my engine. The spec is as follows:
2.1 zetec bottom end. Steal rods etc
T34.63 turbo with marram shaft
3" tube torque exhaust system
Tube torque manifold (turbo over the gear box)
885cc simens injectors
micro squirt management anti lag launch control etc.

But no head! I've had many a debate over the zvh zetec route... Ideally id like to do zvh. Rs1600i rocker cover and some tricky inlet. My questions are....

1. Am i wasting my time doing a zvh rather than a zetec.
2. What spec head is best to do? I've heard of efi heads flowing shit?
3. Who is best to make me an inlet
4. What cam would be best to use?
5. I presume id be best speaking to some one that would do my head and inlet as a package? But who?

Im one of these dangerous people that have a little knowledge and seem to end up with multiple parts that are of no use to me. LOL

Thanks for you're time
Terry x

 

Rs1600i heads have a better design combustion chamber and flow quite nice
For what your going to spend on a good head with cam you best of going full zetec
If its originality your going for then I'd stick with zvh with big valve rs1600i head, Newman fast road cam, solid lifters and for inlet (crazycage) of here does some custom manifolds

 

I bought an mfi head with rs1600i inlet with a Scooby throttle body, but the sandwich plate has to be drilled for the injectors? Then there's this sleveing that's ment to be done?

i just hate the way 16v looks!

dose anyone know the spec of the head that's on the jam sport white escort?

 

You are only going to get one answer from here mate and they will all be saying full zetec

 

Haha here we go again zvh haters.

Simon from sitech racing is the guy to speak to about zvh's he has had some of the best results with his latest one doing around 500bhp

My bro (little bram) has one of his heads on just need to get it mapped again to suit and turn the boost right up lol

 

Terry stop being a girl, stick a zetec head on your zetec engine, its not like its a S1 where you might wanna keep it looking stock ish.

 

How would I go about contacting sitech?

Stewart zetecs just look ugly. I hate them.

 

buy a bda rep rocker cover, best of both worlds.

 

zetec are the best!!! get a cvh head if you want to keep breaking down!! no matter what you do to it its still a crap head! zetecs are the best! its a no brainer..reliable big power and still cheap..they flow 400hp as standard i think to? cant beat them FACT

 

Dont waste any amount of money on a cvh head because in the end it will still be fucked

 

Zetec all the way

 

you can't see them when your driving.

http://sitechracing.co.uk/

 

Not sure if serious...

 

I would go full zetec, you will only need a standard head with devil developments valve springs too run upto 400bhp

I don't know what everyone above is going on about, yes the rs1600i head has the best design in standard form, but you will need a fully modified big valve head too make the most of your bottom end and turbo, the rs1600i head isn't as good as others modified as it can't take valves as large as others

So you will need a xr2i efi head or a crosshatch style head, crosshatch can take 44mm valves and xr2i efi ones have been known too have 45mm valves

Search on google for "puma race engines cvh tuning guide" and this has all the info on heads and which one too choose and why

P.s for a Zvh you will need
Zvh conversion parts
Newman cam (Zvh grind)
Double valve springs
Solid lifters
Head ported
Bigger valves
Ect ect and this will triple the price of fitting the zetec head and valve springs

But it's upto you mate as it's your car, and good results can still be had from a Zvh (500bhp+) but the cvh eats camshafts for a living these days

I would speak too sitech racing as above or jamsport on the Zvh front, or devil developments for zetec turbos and try and find all the pros and cons

For me personally I would go Zvh if I was just changing a bottom end on a mfi car but if going efi it's a lot cheaper too go full zetec and get more power and torque

 

You dont need a big valve cvh head for a zvh, standard cvh valves can do over 400bhp with proper porting and a cam.

Also standard rs turbo valve springs are fine for big power.

 

At the end of the day its your money so do with as you please I like the zvh engine personnaly, just picked up my s2 from sitech and couldnt be happier, give sitech a ring,simon is a helpful bloke, an will tell you whats best for you!

 

My Sitech head has sandard valves and single valve springs. Just ported with cam and solid lifters.

 

To me I wanna open my bonnet on a classic RS turbo n see a cvh head! N come for a spin in mine it's evil!!! Zvh have a certain way they drive I love them I driven them all

 

i had a zvh built by sitech a couple of years ago,stage 2 head, newman cam st170 pistons went like stink and that was on mfi with a 5th injector,be far better on efi

 

having done both routes, I preferred the simplicity of the zvh over the zetec.
however the power delivery of the zetec was much better and higher powered by far.
if you want reasonable power and a little originality then zvh, otherwise zetec all day long.
you've already gone over the top ex manifold, so not keeping it looking classic much.
there are a few high powered zvh's, but zetec produce more still.

 

jamsport head standard valves , custom newman cam , titan rocker rockers ,titanium caps, double valve springs, making 440bhp @27psi atm will do more

 

How much would that head and inlet set up if you don't mind me asking?

 

The ONLY reason to go zvh over full zetec is if you already have a good CVH head that you've sunk a wad of cash into

if you are starting from scratch then its a no brainer.

 

Then in a few years time ever show we go to there will be the same shit every escort, fiesta and focus with zetec turbo's because know one should do anything different like what's been said you don't have to put loads of money in a cvh head just got to get someone who knows what they are doing.

 

If you do nothng to a zetec head and nothing to a cvh head the zetec will give you a better engine

If you spend the same amount of cash on each the zetec will still give you a better engine


Plenty of ways of doing something different without using a cvh head, but then again we are talking imagination, what could be more imaginative than using a 30 year old head

 

This is what concerns me... I don't want to follow suit and become one of the 16v followers.

there aren't many good spec Zvh cars. But surly there is potential? Nearly every one of the Blackpool lot are full zetec. I want to be one of the few to run a 12 with 8v. But how do you get there?!

 

More slowly than with 16 valves

 

lol! I just wee'd